I'm guessing people are largely using the wrong terminology for things that make more sense, like backing up/snapshotting config and data that containers use. Maybe they're also backing up images (which a lot of people call "containers"), just in case it gets yanked from wherever they got it from.

That said, yeah, someone should write a primer on how to use Docker properly and link it in the sidebar. Something like:

1. docker-compose or podman for managing containers (a lot easier than docker run)
2. how to use bind mounts and set permissions, as well as sharing volumes between containers (esp. useful if your TLS cert renewal is a separate container from your TLS server)
3. docker networks - how to get containers to talk w/o exposing their ports system-wide (I only expose two ports, Caddy for TLS, and Jellyfin because my old smart TV can't seem to handle TLS)
4. how tags work - i.e. when to use latest, the difference between <image>:<major>.<minor>.<patch> and <image>:<major>, etc, and updating images (i.e. what happens when you "pull")

I've been using docker for years, but I'm sure the are some best practices I am missing since I'm more of a developer than a sysadmin.